CRETE wrote:DF may be superfluous in temperate regions in France ..
in fact the air leaving the "boosted" PC risks being on the contrary cooled by the stale air at 20 ° C via an exchanger which is expensive and which will only be used 4 months out of 12 unless you live in Alsace or in Moselle ... or at high altitude, no
I was sick of it,
, Ben if, but not any CTA, it is necessary to take a disengageable rotary exchanger, type SWEGN or GEA or others now
http://www.swegon.com/swegon/templates/ ... 16161.aspx the exchangers have a yield of 90%, and with this type of plant, the losses on the fresh air do not represent anything more on the year,
I also reason for the North of France
CRETE wrote: solar air conditioning = by "pebble tunnels" because in June July, the T ° of the platform is still low (15 to 17 ° C ...
)
Like a well sized Canadian well that allows blowing at 14 ° C
I'm calculating that, you have to put the sheaths 5m deep, I see them well in the periphery
CRETE wrote:solar hot water .. why on earth want panels that are difficult to maintain and cost the skin of Ephesus ??
I like the formula
, it is true that I am partisan direct radiation, glazing what, but in this case, nothing to store in the short term (a few days), it is in this that the sensors have their utility, and the enetretien d ' a sensor is limited
CRETE wrote: -For a long time I have always associated an air-water exchange battery on the air circuit at the top of the veranda or on the air sensor, it is in fact a matter of making a hot water unit heater work "upside down" ... we do the same in the USA (I don't know where the hell I put this link but it's on Futura)
AH? but we can not hope to have more than 40 ° C at the top of this type of volume if we want a little bit to enjoy it, and with a loss on the exchange of about 10 ° C to remain reasonable, it is a preheating at 30 ° which is envisaged ... in summer, in winter much less
CRETE wrote:And no need heating floor .. or so a heating wall in mud bricks, coupled with a wood stove or a water sensor ...
BRG house =
The floor heating is interesting from the point of view of comfort, note that it is reversible, the difficulty remains to feed it from a storage to be defined
The pebble solution is interesting because the exchange can be done cheaply with air, and I could see a very large volume isolated under the low floor of the house (around 150m3 with a filling rate of 70% ) to accumulate the summer, and we can imagine all the possible external sources to reinforce the "load": outside air, solar collectors, veranda ...
the house must be strongly insulated from the outside in order to maintain a significant thermal inertia inside
On the calculating side, ima ginons a very well made 75m² floor dwelling on 2 levels with 35% glazing, with 0.2 walls W / m².k coef u and 1.2 W / m².k windows
- Max losses by -7 ° C would be around 3KW (excluding fresh air, excluding sunlight supply and excluding internal inputs lighting, equipment, take the worst case, winter rotten and frozen)
- or an air flow with a blowing at 26 ° C for 19 ° C inside maximum 1200m3 / h (well, we come back to it
)
- a max power for the heating of fresh air (-7 ° C to 26 ° C the fresh air flow voluntarily limited to 200m3 / h) of 2.3 KW
A max balance of about 5KW all confused, excluding various contributions, solar, internal etc ... which makes us according to the calculation of the DJU = 7400 KW.h for the year or 26 640 000 KJ anyway
So, let's see what our pebble pool could provide:
the specific heat is around 2KJ / Liter.k
the rate of "filling" of 70% gives us 150 x 000 x 0.7 = 2 KJ / K and let us take an effective delta T of 210 ° C or 000 KJ available
that is, even 150m3 of pebbles will only provide 1 / 20th or 4% of annual heating requirements, and 8% if I play on a delta T of the mass of 12 ° C
I did not see in the report what% of heating needs in the year brought this type of storage
the Canadian well is good